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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
 WASHINGTON, D.C. 20549
 
 FORM 8-K
 CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(D)
OF THE SECURITIES AND EXCHANGE ACT OF 1934
 Date of Report (Date of Earliest Event Reported)  June 24, 2011
 
 Platinum Underwriters Holdings, Ltd.
  Bermuda
(State or other jurisdiction of 
incorporation or organization)
    
    001-31341
(Commission File Number)
    
    98-041683
(IRS Employer
Identification No.)The Belvedere Building 
69 Pitts Bay Road 
Pembroke, Bermuda
(Address of principal executive offices)
    
    
    
    HM 08
(Zip Code)
 
 
 
  o
    
    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
 o
    
    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
 o
    
    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
 o
    
    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))




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TABLE OF CONTENTS  Item 1.01 Entry into a Material Definitive AgreementItem 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of RegistrantItem 9.01 Financial Statements and ExhibitsSIGNATUREExhibit IndexEX-10.1EX-10.2EX-10.3EX-10.4    Table of Contents  
 Item 1.01
    
    Entry into a Material Definitive Agreement.
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Item 2.03
    
    Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet
Arrangement of Registrant.
  
 Item 9.01
    
    Financial Statements and Exhibits.
 (d)
    
    Exhibits.Exhibit 10.1
    
    Second Amended and Restated Credit Agreement, dated as of
June 24, 2011, among Platinum Underwriters Holdings, Ltd.,
Platinum Underwriters Bermuda, Ltd., Platinum Underwriters
Reinsurance, Inc., Platinum Underwriters Finance, Inc., the
Lenders party thereto, ING Bank N.V., London Branch, as
Documentation Agent, U.S. Bank National Association, as
Syndication Agent, and Wells Fargo Bank, National
Association, as Administrative Agent.Exhibit 10.2
    
    List of Contents of Exhibits and Schedules to the Second
Amended and Restated Credit Agreement. Platinum Underwriters
Holdings, Ltd. agrees to furnish supplementally a copy of any
omitted exhibit or schedule to the Securities and Exchange
Commission upon request.Exhibit 10.3
    
    Committed Letter of Credit Issuance Facility Letter dated
June 30, 2011 among Platinum Underwriters Bermuda, Ltd.,
Platinum Underwriters Reinsurance, Inc., Platinum
Underwriters Holdings, Ltd. (solely for purposes of paragraph
9.2 thereof) and Citibank Europe plc.Exhibit 10.4
    
    Insurance Letters of Credit Master Agreement dated June 30,
2011 among Platinum Underwriters Bermuda, Ltd., Platinum
Underwriters Reinsurance, Inc. and Citibank Europe plc.
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PLATINUM UNDERWRITERS
HOLDINGS, LTD.By:
    /s/ Michael E. LombardozziMichael E. LombardozziExecutive Vice President, General
Counsel and Chief Administrative
Officer  5




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Exhibit Index
 Exhibit Number
    
    DescriptionExhibit 10.1
    
    Second Amended and Restated Credit Agreement, dated as
of June 24, 2011, among Platinum Underwriters
Holdings, Ltd., Platinum Underwriters Bermuda, Ltd.,
Platinum Underwriters Reinsurance, Inc., Platinum
Underwriters Finance, Inc., the Lenders party thereto,
ING Bank N.V., London Branch, as Documentation Agent,
U.S. Bank National Association, as Syndication Agent,
and Wells Fargo Bank, National Association, as
Administrative Agent.Exhibit 10.2
    
    List of Contents of Exhibits and Schedules to the
Second Amended and Restated Credit Agreement. Platinum
Underwriters Holdings, Ltd. agrees to furnish
supplementally a copy of any omitted exhibit or
schedule to the Securities and Exchange Commission
upon request.Exhibit 10.3
    
    Committed Letter of Credit Issuance Facility Letter
dated June 30, 2011 among Platinum Underwriters
Bermuda, Ltd., Platinum Underwriters Reinsurance,
Inc., Platinum Underwriters Holdings, Ltd. (solely for
purposes of paragraph 9.2 thereof) and Citibank Europe
plc.Exhibit 10.4
    
    Insurance Letters of Credit Master Agreement dated June
30, 2011 among Platinum Underwriters Bermuda, Ltd.,
Platinum Underwriters Reinsurance, Inc. and Citibank
Europe plc.
 6